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Finding the Fourth Proportional to 270,129.40, 405,214.61 and 80,574.93

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Solution

The fourth proportional to 270,129.40, 405,214.61 and 80,574.93 is: 120,868.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,129.40 : 405,214.61 = 80,574.93 : x
  2. Step 2: Convert to fraction form
    270,129.40/405,214.61 = 80,574.93/x
  3. Step 3: Cross multiply
    270,129.40x = 405,214.61 × 80,574.93
  4. Step 4: Simplify right side
    270,129.40x = 32,650,138,835.73
  5. Step 5: Solve for x
    x = 32,650,138,835.73/270,129.40
  6. Step 6: Final answer
    x = 120,868.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.